View Javadoc

    1   /**
    2    * BSD-style license; for more info see http://pmd.sourceforge.net/license.html
    3    */
    4   package net.sourceforge.pmd.lang.java.typeresolution.rules.imports;
    5
    6   import net.sourceforge.pmd.lang.ast.Node;
    7   import net.sourceforge.pmd.lang.java.ast.ASTImportDeclaration;
    8   import net.sourceforge.pmd.lang.java.ast.ASTName;
    9   import net.sourceforge.pmd.lang.java.ast.DummyJavaNode;
    10  import net.sourceforge.pmd.lang.java.ast.TypeNode;
    11  import net.sourceforge.pmd.lang.java.rule.ImportWrapper;
    12  import net.sourceforge.pmd.lang.java.rule.imports.UnusedImportsRule;
    13
    14  public class UnusedImports extends UnusedImportsRule {
    15
    16      @Override
    17      public Object visit(ASTImportDeclaration node, Object data) {
    18  	if (node.isImportOnDemand()) {
    19  	    ASTName importedType = (ASTName) node.jjtGetChild(0);
    20  	    imports.add(new ImportWrapper(importedType.getImage(), null, node));
    21  	} else {
    22  	    super.visit(node, data);
    23  	}
    24  	return data;
    25      }
    26
    27      @Override
    28      protected void check(Node node) {
    29  	if (imports.isEmpty()) {
    30  	    return;
    31  	}
    32  	ImportWrapper candidate = getImportWrapper(node);
    33  	if (imports.contains(candidate)) {
    34  	    imports.remove(candidate);
    35  	    return;
    36  	}
    37  	if (TypeNode.class.isAssignableFrom(node.getClass()) && ((TypeNode) node).getType() != null) {
    38  	    Class<?> c = ((TypeNode) node).getType();
    39  	    if (c.getPackage() != null) {
    40  		candidate = new ImportWrapper(c.getPackage().getName(), null, new DummyJavaNode(-1));
    41  		if (imports.contains(candidate)) {
    42  		    imports.remove(candidate);
    43  		}
    44  	    }
    45  	}
    46      }
    47  }